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KIM [24]
2 years ago
5

Solve for n 0=-5n-2n

Mathematics
1 answer:
iris [78.8K]2 years ago
4 0
0 = -5n - 2n
0 = -7n    <em>|divide both sides by (-7)</em>

<u>n = 0</u>
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kicyunya [14]

Answer:

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Step-by-step explanation:

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2 years ago
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Oksanka [162]

Answer: -3.0593

Step-by-step explanation:

The test statistic for the difference between two population mean (when population standard deviations \sigma_1\ \&\ \sigma_2  are known ) is given by :-

z=\dfrac{\overline{x}_1-\overline{x}_2}{\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}}

where ,

n_1\ \&\ n_2 = Sample sizes taken from two  populations 1 and 2.

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\sigma_1\ \&\ \sigma_2 = Standard deviations of populations 1 and 2.

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We assume that the data follows a normal distribution.

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